Find flights
Deals
When to book
FAQs

Cheap flights from Seattle to Denver from £81

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/6. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — DEN
20 Jun — 27 Jun1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Seattle to Denver

Enter your travel dates to find the best prices.

Cheapest flights from Seattle to Denver
Explore the most affordable flight options available from Seattle to Denver. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 21 May 2026.

Thu 13/819:41
SEA
-
DEN
Nonstop2h 52m
Frontier
Sun 23/807:45
DEN
-
SEA
Nonstop3h 03m
Frontier
Deal found 19/5£163
Mon 8/620:07
SEA
-
DEN
Nonstop2h 52m
Alaska Airlines
Tue 9/612:20
DEN
-
SEA
Nonstop3h 03m
Alaska Airlines
Deal found 18/5£169
Fri 10/719:06
SEA
-
DEN
Nonstop2h 52m
Frontier
Sun 12/707:13
DEN
-
SEA
Nonstop3h 04m
Frontier
Deal found 21/5£178
Fri 25/921:16
SEA
-
DEN
1 stop5h 36m
Frontier
Tue 29/907:30
DEN
-
SEA
1 stop6h 30m
Frontier
Deal found 21/5£187
Mon 8/617:35
SEA
-
DEN
1 stop6h 05m
Southwest
Tue 9/606:15
DEN
-
SEA
2 stops8h 20m
Southwest
Deal found 18/5£225
Sat 1/819:59
SEA
-
DEN
Nonstop2h 45m
Delta
Tue 4/813:14
DEN
-
SEA
Nonstop3h 04m
Delta
Deal found 18/5£227

Find flight deals from Seattle to Denver

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Denver (DEN). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 21 May 2026.

Round-trip from

£163

One-way from

£81

Popular in

June

Cheapest in

January

Average price

£192
Frontier
  • Frontier
  • 13/8-23/8
  • Nonstop
  • 5h 55m total
  • Seattle to Denver
Search Deals
Delta
  • Delta
  • 9/6
  • Nonstop
  • 2h 48m total
  • Seattle to Denver
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (£19 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£4 potential savings vs. average return price).
Search Deals
Average for round-trip flights in May 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Seattle to Denver that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 21 May 2026.
Use the filters below to find and compare flights from Seattle to Denver that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Sat 15/8

16:29-20:13

Nonstop2h 44m

Denver Intl

Wed 2/9

13:43-19:52

1 stop7h 09m

£235

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Tue 16/6

07:30-15:50

2 stops7h 20m

Denver Intl

Tue 30/6

19:25-23:30

1 stop5h 05m

£246

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Wed 24/6

07:30-17:05

2 stops8h 35m

Denver Intl

Sat 27/6

18:55-00:35

1 stop6h 40m

£246

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Sat 13/6

05:30-13:50

2 stops7h 20m

Denver Intl

Wed 17/6

18:55-23:10

1 stop5h 15m

£259

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Fri 25/9

16:30-23:05

1 stop5h 35m

Denver Intl

Tue 29/9

09:00-16:50

2 stops8h 50m

£262

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Wed 26/8

07:40-14:40

1 stop6h 00m

Denver Intl

Sun 30/8

18:05-00:50

2 stops7h 45m

£262

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Sat 15/8

05:00-12:25

1 stop6h 25m

Denver Intl

Sun 30/8

07:35-14:00

2 stops7h 25m

£262

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Wed 24/6

07:30-15:50

2 stops7h 20m

Denver Intl

Mon 29/6

13:25-19:30

2 stops7h 05m

£265
Fastest return journey

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Thu 23/7

05:15-08:50

Nonstop2h 35m

Denver Intl

Mon 27/7

13:25-19:30

2 stops7h 05m

£268

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Wed 1/7

07:30-17:05

2 stops8h 35m

Denver Intl

Sun 5/7

13:45-19:25

1 stop6h 40m

£269

Flights are sorted by cheapest return flights first.

Deals found on 18/5

Showing 1-10 of 22 resultsSorted by cheapest first
1
2
3

Best time to book a flight from Seattle to Denver

Have a flexible travel schedule? Discover the best time to fly to Denver from Seattle with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Seattle to Denver

How far ahead should I book a flight from Seattle to Denver?

The price you pay for your flight from Seattle to Denver may vary depending on when you book. For the best chance of a lower fare, look to book 60 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from Seattle to Denver?

Currently, January is the cheapest month in which you can book a flight from Seattle to Denver (average of £119). Flying from Seattle to Denver in June is currently the most expensive (average of £201). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from SEA to DEN?

Find hourly flight availability from Seattle to Denver. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 21 May 2026.

One of the essential ways to save on airfare from Seattle to Denver is to remain as flexible as possible. Flights that are in the afternoon tend to be the most expensive. A flight in the evening could potentially save you up to 65% on airfare.

How much does it cost for a return flight from Seattle to Denver?

Related info for your journey

Find useful and relevant information for your journey from Seattle to Denver. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How popular is this Seattle to Denver flight route?

    Flights from Seattle/Tacoma Intl to Denver Intl have been viewed 5 times in the past calendar month.

  • How long is the flight from Seattle to Denver?

    Departing from Seattle to Denver will take you 2h 45m. The distance between Seattle and Denver is about 1022 mi. This flight may include one or multiple stops.

  • What are the most reliable airlines from Seattle to Denver?

    No one likes to see their flight delayed. When booking a flight from Seattle to Denver consider choosing STARLUX Airlines (99%), Icelandair (98%) or ANA (97%) as they are the most reliable in getting you off to your destination on time.

  • Can I find deals for flights from Seattle to Denver that include hotel bookings?

    Yes. In addition to deals on Seattle to Denver flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Seattle to Denver?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Denver.

  • Can I find deals for business class flights from Seattle to Denver?

    Yes. Cheapflights offers flight deals from Seattle to Denver by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Seattle to Denver?

    Currently, January is the cheapest month in which you can book a flight from Seattle to Denver (average of £119). Flying from Seattle to Denver in June is currently the most expensive (average of £201). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Seattle to Denver?

Cheapflights makes it easy to find Seattle to Denver flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from Seattle to Denver?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Denver from Seattle.

Can Cheapflights find flights from Seattle to Denver with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Seattle to Denver flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from Seattle to Denver become cheaper?

Of course! You can now track prices for flights from Seattle to Denver and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.